ICD-10 Code H50.12 – Monocular exotropia with A pattern (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H50.12 – Monocular exotropia with A pattern
What it is
H50.12 identifies a monocular exotropia in which one eye turns outward, with an A-pattern change in alignment. Use it when the record specifically documents this strabismus pattern.
Clinical signs
Typical findings include outward deviation of one eye that changes with gaze position, showing greater exotropia in downgaze or upgaze consistent with an A pattern. Clinical features vary; refer to documentation.
When to use this code
Use H50.12 when the provider documents monocular exotropia with A-pattern behavior on exam, orthoptic testing, or ophthalmology assessment. It is appropriate for charted strabismus that is clearly unilateral and pattern-specific. Check documentation if laterality or pattern is unclear.
Do not use for
Do not use this code for intermittent exotropia, nonpattern exotropia, or esotropia. If the note does not confirm an A pattern, choose the more specific documented diagnosis or check documentation.
Coding tip
Confirm both elements—monocular exotropia and A pattern—before assigning H50.12.